<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>五星红旗</title>
    <style>
        .fu {
            width: 300px;
            height: 200px;
            background-color: red;
            margin: 100px auto;
        }

        .z1 {
            width: 100px;
            height: 100px;
   
            font-size: 100px;
            text-align: center;
            line-height: 100px;
            color: yellow;
        }

        .z2 {
            width: 25px;
            height: 25px;
            
            font-size: 25px;
            text-align: center;
            line-height: 25px;
            color: yellow;
            transform: rotate(25deg) translate(100px,-100px);
            transform-origin: 112.5px -87.5px;
        }

        .z3{
            width: 25px;
            height: 25px;
         
            font-size: 25px;
            text-align: center;
            line-height: 25px;
            color: yellow;
            transform: rotate(50deg) translate(125px,-100px);
            transform-origin: 137.5px -87.5px;
        }

        .z4 {
            width: 25px;
            height: 25px;
        
            font-size: 25px;
            text-align: center;
            line-height: 25px;
            color: yellow;
            transform: rotate(0deg) translate(125px,-100px);
        }

        .z5 {
            width: 25px;
            height: 25px;
            
            font-size: 25px;
            text-align: center;
            line-height: 25px;
            color: yellow;
            transform: rotate(30deg) translate(100px,-100px);
            transform-origin: 112.5px -87.5px;
        }
    </style>
</head>

<body>
    <div class="fu">
        <div class="z1">★</div>
        <div class="z2">★</div>
        <div class="z3">★</div>
        <div class="z4">★</div>
        <div class="z5">★</div>
    </div>
</body>

</html>